A Control Strategy for Islanded Three-Phase Inverter with Nonlinear and Unbalanced Loads

Wang, Bo; Yang, Fujun; Lü, Chao; Ying-jun, Feng; Xiao, Chenguang; Ning, Xing; Han, Yi

doi:10.1109/isgt-asia.2019.8880874

Cited by 4 publications

(1 citation statement)

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“…The study in [ 15 ] combined improved repetitive control with instantaneous control, and introduced repetitive control to eliminate periodic harmonic disturbances, but the dynamic response was insufficient. The study in [ 16 ] converted the 5th and 7th harmonics and negative sequence components into DC through multiple coordinate transformations for control, but the use of a large number of low-pass filters reduced the dynamic performance of the system. In the case of nonlinear load dynamic change, the PI controller cannot achieve a good control effect and a fast response to harmonics.…”

Section: Introductionmentioning

confidence: 99%

Investigation of an Output Voltage Harmonic Suppression Strategy of a Power Quality Control Device for the High-End Manufacturing Industry

Wan

et al. 2022

Micromachines

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Due to the influence of nonlinear loads, power quality control devices under the traditional double closed-loop control strategy suffer from a large output voltage harmonic distortion rate and a slow harmonic suppression response and cannot meet the high-quality power supply requirements of high-end manufacturing. A compound control strategy based on voltage feedback and current feed-forward is proposed to solve the voltage quality problem under a nonlinear load. Firstly, based on the mathematical model of power quality control device, the working principle and voltage current coupling relationship are analyzed. Then, an output voltage compound control strategy based on feed-forward and feedback is proposed, and the harmonic suppression mechanisms are deduced and analyzed. Finally, simulation and experimental results are presented to show that, compared with the traditional double closed-loop control strategy, the harmonic suppression effect of the composite control strategy proposed in this paper can be increased by 2.2%, and the response time is decreased to 100 ms.

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Section: Introductionmentioning

confidence: 99%